MATLAB: Problem with using parfor

parfor

Hello All,
I am trying to make use of parfor, but I keep getting the following error "parfor cannot run due to the way the variable 'data' is used." Any thoughts?
Thanks in advance
    parfor iel=1:tne
        start=(iel-1)*576+1;
        end1=576*iel;
        data(start:end1)=data2(iel,:);
    end

Best Answer

    parfor iel=1:tne
        data((iel-1)*576+1:576*iel)=data2(iel,:);
    end
That is, MATLAB can analyze literal indices in ways that it cannot do when those indices are computed.
However, unless you have good reason not to, you should simply create data as a 576 x something array and without using parfor,
    data(:, 1:tne) = data2(:, 1:tne) .';
... especially if you can manage to compact it down to just
    data = data2 .';
After the copying has been done with 2D indices, then it is very fast to
    data = reshape(data, 1, []);
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